To determine which balloon company the O’Donnells should choose, we can set up a system of equations to calculate the total cost for each company given that they plan to order 30 balloons.
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Balloon Express charges:
- \(2\) dollars per balloon
- \(10\) dollars for delivery
The total cost for Balloon Express (\(C_E\)) can be calculated as: \[ C_E = (2 \times 30) + 10 = 60 + 10 = 70 \text{ dollars} \]
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Balloon Mania charges:
- \(1.50\) dollars per balloon
- \(20\) dollars for delivery
The total cost for Balloon Mania (\(C_M\)) can be calculated as: \[ C_M = (1.50 \times 30) + 20 = 45 + 20 = 65 \text{ dollars} \]
Next, we compare the total costs:
- Total cost for Balloon Express: \(C_E = 70\) dollars
- Total cost for Balloon Mania: \(C_M = 65\) dollars
The difference in cost, or how much the O’Donnells would save by choosing Balloon Mania over Balloon Express, is: \[ \text{Savings} = C_E - C_M = 70 - 65 = 5 \text{ dollars} \]
Therefore, the O’Donnells should choose Balloon Mania and will save $5.
So the correct answer is: Balloon Mania; $5.